December weather forecastDearborn, MO
December
Weather in December
The first month of the winter, December, is also an icy month in Dearborn, Missouri, with an average temperature fluctuating between 26.6°F (-3°C) and 40.1°F (4.5°C).Temperature
December brings a decrease in the average high-temperature, falling from November's cool 52.2°F (11.2°C) to a cold 40.1°F (4.5°C). An average low-temperature of 26.6°F (-3°C) is observed during December nights.Humidity
In December, the average relative humidity is 74%.Rainfall
In December, the rain falls for 5.8 days. Throughout December, 1.06" (27mm) of precipitation is accumulated. Throughout the year, there are 130.5 rainfall days, and 26.38" (670mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Dearborn, in December, during 3.1 snowfall days, 0.91" (23mm) of snow is typically accumulated. Throughout the year, in Dearborn, there are 17.5 snowfall days, and 7.09" (180mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 24min of daylight.On the first day of the month, sunrise is at 7:21 am and sunset at 4:55 pm. On the last day of December, sunrise is at 7:39 am and sunset at 5:05 pm CST.
Sunshine
In Dearborn, the average sunshine in December is 5.4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Dearborn. A UV Index value of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: In December, a daily UV index of 2 turns into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Dearborn, MO
- Average high temperature in December: 40.1°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in December: 26.6°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Dearborn, MO
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Dearborn, MO
- Average wind speed in December: 9.3mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in December
Dearborn, MO
- Average humidity in December: 74%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall in December
Dearborn, MO
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in December
Dearborn, MO
- Average rainfall days in December: 5.8 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in December
Dearborn, MO
- Average snowfall in December: 0.91"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Dearborn, MO
- Average snowfall days in December: 3.1 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Dearborn, MO
- Average daylight in December: 9h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in December
Dearborn, MO
- Average sunshine days in December: 21.7 days
The month with the most sunshine days is January (22 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in December
Dearborn, MO
- Average UV index in December: 2
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Dearborn, MO
- Average cloud cover in December: 41
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in December
Dearborn, MO
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
